Disclosed is a method for evaluating computational fluid dynamic simulation results. The method includes: performing at least two baseline runs of a simulated area or volume containing a first vehicle body shape using a set of initial conditions, performing a change run using a second vehicle body using the set of initial conditions, creating a noise map based on differences between the second baseline run and the first baseline run, creating a change map based on differences between the change run and a selected baseline run, and comparing the change map to the noise map.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The method of claim 1, wherein comparing the change subtraction image to the noise subtraction image involves discounting changes that occur in the change subtraction image at points where noise exists in the noise subtraction image.
3. The method of claim 1, wherein comparing the change subtraction image to the noise subtraction image involves disregarding changes that occur in the change subtraction image at points where noise exists in the noise subtraction image.
4. The method of claim 1, wherein comparing the change subtraction image to the noise subtraction image involves setting a value of the change subtraction image at each given point to zero if a value of the noise subtraction image at the given point is greater than the value of the change subtraction image at the given point.
5. The method of claim 4, wherein, after setting a value of the change subtraction image at each given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image, the change subtraction image shows only changes between the change computational fluid dynamic simulation and the selected baseline computational fluid dynamic simulation that exceed the value of the noise subtraction image.
6. The method of claim 5, wherein all of the changes shown in the change subtraction image, after setting a value of the change subtraction image at each given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image at the given point, the changes shown in the change subtraction image are all considered statistically significant.
8. The method of claim 7, wherein comparing the change subtraction image to the noise subtraction image involves visually comparing the change subtraction image to the noise subtraction image, and discounting changes that occur in the change subtraction image at points where noise exists in the noise subtraction image.
9. The method of claim 7, wherein comparing the change subtraction image to the noise subtraction image involves visually comparing the change subtraction image to the noise subtraction image, and disregarding changes that occur in the change subtraction image at points where noise exists in the noise subtraction image.
10. The method of claim 7, wherein comparing the change subtraction image to the noise subtraction image involves setting a value of the change subtraction image at a given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image at the given point.
11. The method of claim 10, wherein, after setting a value of the change subtraction image at each given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image at the given point, the change subtraction image shows only changes between the change computational fluid dynamic simulation and the selected baseline computational fluid dynamic simulation that exceed the value of the noise subtraction image.
12. The method of claim 11, wherein, after setting a value of the change subtraction image at each given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image at the given point, all of the changes shown in the change subtraction image are considered statistically significant.
14. The system of claim 13, wherein comparing the change subtraction image to the noise subtraction image involves setting a value of the change subtraction image at each given point to zero if a value of the noise subtraction image at the given point is greater than the value of the change subtraction image.
15. The system of claim 14, wherein, after setting a value of the change subtraction image at each given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image, the change subtraction image shows only changes between the change computational fluid dynamic simulation and the selected baseline computational fluid dynamic simulation that exceed the value of the noise subtraction image.
16. The system of claim 15, wherein all of the changes shown in the change subtraction image, after setting a value of the change subtraction image at each given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image, the changes shown in the change subtraction image are all considered statistically significant.
18. The system of claim 17, wherein comparing the change subtraction image to the noise subtraction image involves setting a value of the change subtraction image at each given point to zero if a value of the noise subtraction image at the given point is greater than the value of the change subtraction image.
19. The system of claim 18, wherein, after setting a value of the change subtraction image at each given point to zero if the value of the noise subtraction image at the given point is greater than the value of the change subtraction image, the change subtraction image shows only changes between the change computational fluid dynamic simulation and the selected baseline computational fluid dynamic simulation that exceed the value of the noise subtraction image.
20. The system of claim 13, further comprising the vehicle.
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August 30, 2019
March 12, 2024
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